871779315540 has 48 divisors (see below), whose sum is σ = 2789693811072. Its totient is φ = 199263843456.

The previous prime is 871779315427. The next prime is 871779315581. The reversal of 871779315540 is 45513977178.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1037832099 + ... + 1037832938.

It is an arithmetic number, because the mean of its divisors is an integer number (58118621064).

Almost surely, 2^871779315540 is an apocalyptic number.

It is an amenable number.

871779315540 is an abundant number, since it is smaller than the sum of its proper divisors (1917914495532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

871779315540 is a wasteful number, since it uses less digits than its factorization.

871779315540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2075665056 (or 2075665054 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 57.

The spelling of 871779315540 in words is "eight hundred seventy-one billion, seven hundred seventy-nine million, three hundred fifteen thousand, five hundred forty".